Dr. Jekyll, Victorian-era gentleman, mysterious, sinister, split personality, Mr. Hyde, dark alleys, London, foggy nights, gas lamps, old laboratory, experiment equipment, test tubes, beakers, leather-bound books, eerie atmosphere, dim lighting, close-up of Dr. Jekyll's face, transformation into Mr. Hyde, intense facial expressions, dramatic makeup, worn suit, top hat, walking stick, dark cloak, Gothic architecture, abandoned streets, misty background, cinematic composition, low-key lighting, horror theme.